Electrically-actuated surfacing machine



July 17, 1928.

G. STAEHLE ELECTRICALLY ACTUATED SURFACI NGIFA CHINE Filed May 4. i926 usfav [fee/Z10 2 7 Patented July 17, 1928.

UNITED STATES GUSTAV STAEHLE,

PATENT OFFICE,

F S'IUTTGART, GERMANY, ASSIGNOR TO CYKLOP .AK'I. GES., OF

SCHAFFHAUSEN, SWITZERLAND, AFIBM.

nLEcrRrcALLY-Aoruiirm sUarAcme MACHINE.

' Application filed may 4, 1926, Serial No.

This invention has for its subject-matter a machine for the treatment of any kind of surface by means of a brush-like tool and specially for the execution of such work in 6 which fine cuttings or shavings or dust are or is produced. The machine is more'es 'pecially suitable and intended for the treatment of parquet flooring or other similar wood flooring. It may also be used, however, for the treatment of lignum vitae flooring or stone flooring or other desired sur- 'faces consisting of other material. By using corresponding and'suitable brushes the machine can be further used for surfacing,

l5 abrading, smoothing, waxing and polishing f-fiooring and otherrsurfaces. By providing the machine with a suitable accessory it may also be used as a suction or vacuum cleaner.

2 The machine is hereinafter described as applied for use in effecting the surfacing or shaving of flooring. It is, already known I in surfacing or shaving of flooring to use rotatable brushes. In apparatus of this type 2 the cuttings or shavings or the dust in consequence of the high speed .of rotation of the brushes. escapes outwardly and/or is ejected outwardly so that the'chamber or room in which the work is carried on becomes filled with dust which can'only be remove after considerable trouble and care.

A particular feature of the present machine consists in that the cuttings, shavings -or dust created isrevented from rising as externally of the mac ine. For this purpose the working space of the -machine is surrounded by a suction space out of which the dust-laden air is sucked by means of a vane, ,wing or fan-wheel or the equivalent and thereafter conveniently delivered to an external filter-bag known per se in vacuum or cleaning apparatus. 1

In order that the invention may be clearly understood and readily carried into effect reference is made to the accompanyingdrawing which shows by way of example a constructioiial form in accordance with the present invention.

Figure 1 partly in section is a front elevation of the machine, .the sectional part being shown as a. central vertical section.

Figure 2 is a plan of Figure 1.

Figu to a reduced scale shows I re 3 drawn a general arrangement of the entire machine 56 provided with afilter-bag.

ed to engage with rubber said air being has a double material removed of the air drawn in- 106,687, and in Germany March 9, me.

A friction driving member 3 is rigidly secured on the shaft 1 of an electric driving motor 2 the said friction driver being adaptbands or rings 4 which are arranged on steel-wire brushes 5. Thebrushes 5 are supported on flat arms 6 each of which is rockable about a pivot 7 the two arms 6 being constrained towards each other at their free ends by a spring 8 so that the rubber rings f and consequently the brushes are constantly maintained against the friction driving member 3. c

The drive for the brushes and the brushes themselves are surrounded 'by a bell-like casing 9 which is arranged in a similar belllike casing 10, a free space 11 being provided between the two casings 9 and 10 On theelectro-motor shaft 1 is secured a vane, wing or fan-wheel which as shown 1s retained in position onthe shaft by means 0 the ring 3 and an external screw thread provided on the shaft 1 of the electric driving motor. The blades or vanes of the fan or wing-wheel 12 are so disposed that air is drawn in from the circumference of the brushes during the rotation of the ,motor' shaft 1 and'the working of the brushes, the

drawn in through the intermediate space 11 between'the casings 9 and d 10. The air thus sucked in is ejected through a pipe 13 into a filter-bag 14 which (known per se invacuum or suction cleaners) is 'susended in a readily removable manner from the handle-bar 15 of the machine by means of a chain 16 or equivalent.

The handle-bar 15 is conveniently secured by meansof a split clamping is rigidl connected with a strap 17 the said stra' being pivotally mounted as at 18 on the mac nc-casing.

'In order to ensure that the cuttings or shavings or the material removed by the the dust thrown up brushes 5 or brushes 5 shall enter the suction zone a curtain 20 is provided which surrounds the edges of the casing 10 the said curtain being formed of bristles or other like steel-wire by the steel-wire material which bears resiliently on the floor Such curtain or other surface to be treated.

function. First to revent the the cuttings, shavings or the by the brushes beyond the suction zone and secondly to act as a diffuser that is to say to create a uniform distribution throughout the circumprojection of device 19 which terence-oif the casing so that such air cur rent is more or less uniform all round the said casing more especially Where the surface being treated lSJOf a somewhat uneven nature. i y

Instead of bristles in the strict sense of the Word, horse-ha-ir'or other kind of hair or material could be used for the curtain 20.

The brushes 5 are conveniently provided with steel bristles which are similar to and similarly arranged as steel wire scratchbrushes or Wire-brushes. 'llhe brushes are preferably conveniently removable and replaceable by other types of brushes so thatv the machine after surfacing, cutting, shavingor cleaning or other operation can also be used for smoothing as by abrading, Waxing, polishing or any other desired operation.

What ll claim is A cleaning machine comprising a casing;

iterates casing and adapted to contact with the surface to be c1eaned;'and a bell-shaped casing mounted Within and in spaced relation to the first-named casing to form a passage for the suction air from the curtain member to the fan said passage limiting the suction action to the curtain inember and. said curtain member preventing the particles loosened by the brushes from flying outwardly beyond the suction zone and creating a uniform distribution of the air of the suction action.

In testimony whereof I ailix my signature.

GUSTAV STAEHLE. 

